ubuntu18.4通过apt的方式更新cmake到最新版(ppa)

添加签名密钥

wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | sudo apt-key add -

将存储库添加到您的源列表并进行更新

稳定版

sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
sudo apt-get update

候选发布版本

sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic-rc main'
sudo apt-get update

地址如下:https://apt.kitware.com/